Lubricator



J. S. CRAIB Feb. 3, 1931.

Lumcuon Filed Nov. 50, 1926 d I' A and showing the Patented Feb. 3, 1931 UNITED A STAT lApplioatiou tiled November 30,

-My invention aims to provide improvements in lubricators of the type wherein the.V outlet is automatically regulated to roduce la substantially uniform delivery o lubricant.

In the drawings, which illustrate preferred embodiments of my invention Figure 1 is a sectional elevation of a cup showing the stem carried b the cup body, and showing the position o the parts when the cup is full of lubricant; r

Fig. '2 is a section similar to Fig. 1, but showing the relation of the parts of the cupwhen the cup is empty;

Fig. 3 is an elevation of the body portion' of the cup shown in Figs. 1 and 2;

Fig. 4; is a section on the line 4 4 vof Fig. 1, showing, in dotted lines, the position of the means for holdin the piston-actuating spring vcompressed uring the filling operation of the cup;

Fig. 5 is an elevation of the piston and pis ton-carrying ortion of the cup; and

Figs. 6 and show two sectional elevations of a lubricant cup adapted to be charged with lubricant from a lubricant gun or the like, parts in the positions they occupy whenthe cup is empty and when full.

Referring irst to thecup illustrated by- Figs. 1 through \5, l have shown a body part 1, a' piston-carrying part 2 and a part 3 for coupling together the piston-carrying part 2' and body part 1. The couplin of the parts is eected by bayonet slots 4 ormed in the lower edge of ther` body part 1 (Fig. 3) and pins 5 shown in Fig. 5, the parts being coupled, as shown in Figs. 1 and d.

The piston-carrying part 2 has a hollow eX- tension 6 provided with keys 7 on opposite sides and this keyed extension passes through an opening 8 of similar cross-section in the part 3 as shown portion 9 fits the inner wall of the body part 1 and a spring 9a is interposed between thisl piston portion 9 and the part 3 to exert a pressure upon the lubricant in the bodylpart 1 (or reservoir). YThe 11 per end of the eX- tension 6 has a restricte orifice 1 0 and the. lower end isscrew-th'readed to secure the cup to a part to'be lubricated.

in Figsfl, 2 and 4. The piston Es *PATENT ortica QUEBEC, CANADA, AssIGNoR., nfmsms As- OF CHICAGO, ILLINOIS, A CORPORATION 0F LUBnIcATon 1926, Serial N'o. 151,712, and in Great Britain December 12, 1925.

" vai. lubricant flow controlling element or stem 11,(wl1ich in this instance is shown as' tapered) is suspended from the top of the body part 1 and is provided with a threaded extension 12 which is threaded through the top `of'thevbody'part l1 (Figs. 1 and 2) so that the flow controlling element or stem 11 may be adjusted longitudinally with relation `to the orifice 10. A nut 13 is provided to loch they stem in its adjusted position.,

' Any method' may be used in filling the cup constructed as shown in Figs. l1 through 5, but l have shown a cup which may be Filed by hand when it is taken a art. 'lheoperation of fillingis simple, it eing merel necessary to lift the body of the cup, an then turn it. During thelifting part .of the oneration, the keys 7 are disengaged from t e slots, in the part 3, and when it is turned, the spring is held in compressed position as shown in Fig. 5. rll`he turned to release it from the pins 5, and may be pulled away from the piston-carrying part 2. -When the reservoir has been filled, the

cup may be put together again and is then,

ready to discharge lubricant as shown in body 1 may then bey leo 1. v s the body part 1 travels downwardly relative to the piston 9,`the degree of compression of the spring 9a, decreases, so that the pressure, tending to force the lubricant fto the bearing, also decreases.

By reason of the stem downwardly cup, it passes through the outlet orifice 1()"an`d the passage through which the lubricant is forced is controlled by the movement of the stem. lThis counteracts the effect due to the decrease inthe compression of the spring, so as to provide for a substantially uniform flow of lubricant to the bearing.

`Whenusing lubricants of various viscosities, or, when for any reason it is desirable to change, or regulate, the flow of lubricant, this can be easily and quickly effected by first slackening the lock nut 13, and then turning the screw-threaded extension of the stem 11 to raise or lower the stem, with respect to the piston. Thus, when a tapered stem 11 11 being carried with the body portion 1 of the SOl of the annular orifice can be made greater or smaller as desired throughout the complete travel of the part 1 relative to the part 2, and therefore a greater or smaller uniform flow of lubricant may be obtained.

rllhe cup shown in Figs. 6 and 7 employs substantialy the same principles for the con-y trol of the ow of lubricant through the discharge orifice and the regulation of the stem as described in connection with Figs. 1 through 5, except that the cup is provided with means whereby the reservoir may be filled by a gun or the like without taking the cup apart. Also the stem 11 is Acarried by the piston 9, which reciprocates in the body portion 1.

In this instance, the adjustment of the stem 11 is made relative to the piston 9 by means of a rotatable slee-ve 14 which passes through the top of the body part 1 and a non-cylindrical extension 15 of the stem, beyond the threaded portion. This non-cylindrical portion 15 passes through a hole 16 of similar cross-section formed in the sleeve 14,

. so that, when the outer end 17 of the sleeve is rotated, the stem will be adjusted upwardly or downwardly relative to the piston 9. The non-cylindrical extension also serves as an indicator, whereby it indicates the relative position ofthe piston 9 in the cup, and therefore gives a general idea of how much lubricant remains in the reservoir.

This cup may be filled through an opening 18 adjacent 'the bottom of the cup, and a usual ball check valve 19 is provided, so that lubricant may be forced into the cup but cannot return. A cover 20 for the opening 18 is also provided to keep dust and dirt therefrom. 1

In both types of cups illustrated, the external adjustments are conveniently located, so that the stem may be adjusted at any time and without taking the cup apart. v

My invention is not restricted to the illustrative embodiment of the invention shown and described.

Claims:

l. A lubricator cup comprising a body portion providing a lubricant reservoir, a iow controlling element carried by said body portion, a piston in said reservoir adapted to be secured toa part to be lubricated, vspring means providing forrelative movement between said piston and said body portion to force the lubricant from said reservoir and a discharge orifice through said piston in which said flow controlling element moves to control the flow of lubricant through said Meien tween said piston and said body portion to force lubricant from said reservoir, a discharge orifice through said piston through which said flow controlling element moves to control the flow of lubricant through said orice as the flow controlling element moves relative to the piston and meansextending externally from said body portion whereby said stem may be adjusted to control the discharge of lubricant..

3. A lubricant cup comprising a body portion providing a lubricant reservoir, a tapered stem carried by said body portion, a piston in said reservoir and a spring for moving the stem Vrelative/to said piston, said piston having a lubricant discharge orifice therethrough, through which said stem moves to provide a reducing resistance to the expulsion of lubricant as said spring` weakens.

4. A lubricant cup comprising a body -por-y tion providing a lubricant reservoir, a tapered stern carried by said body portion, a piston in said reservoir and a spring for pressing the stem toward said piston, said piston having a lubricant discharge orifice therethrough through which said stem moves ytol provide a reducing resistance to the expulsion of lubricant as said spring weakens, and means extending externally from said body portion whereby said stem may be adjusted relative to the body portion for controlling the discharge of lubricant from the cup.

5. A lubricant cup comprising a body part providingv a reservoir, a piston part located in said reservoir, means providing a discharge orifice, an adjustable stem located within said cup and adapted to pass into the discharge orifice to regulate the delivery of lubricant through said discharge orifice with relation to the pressure placed upon the lubricant in the reservoir, said stem having an adjustably threaded connection with one of said parts and an extended handle connection projecting exteriorly of said cup whereby the position of said stem will be directed and may be varied axially relative to the discharge orilice by operating the extended handle connection to adjust the threaded connection of the stem.

6. A lubricator cup comprising a body portion providing a reservoir, a piston in said reservoir, means providingy a discharge orilice, a spring for moving said piston to discharge lubricant from the cup through said orifice, an adjustable stem forming part of the cup assembly and adapted to pass into said orifice to regulate the discharge of lubricant `therethrough and indicating means extending from said stem to the outside of said cup,

7 A lubricator cu comprising a. body portion providin a lu ricant reservoir, a stein carried by sai v body portion, a .iston in said reservoir, sprin means provi. ng for relative movement tween sald piston and sald body portion to force the lubricant from said y reservoir, and a discharge orifice through said piston through which said stemma move to control the flow of lubrlcant throu saidoriice as the stem moves relative. to t e piston, said stem havinglan extension passmg upwardly through t e top 0f said body portion and provided with means whereby said stem may be ad'usted longitudinally y l5 relative to the body o the cup, said means providing for holding said Astem in adjusted position.

8. A lubricant cup comprising a body wart I providing a lubricant chamber, a piston xed 2c with relation to the part to be lubricated,

means providing a l ricant discharge orice, a stern for controlling the ow of lubricant through said orifice, means for moving the body part relative to the piston to lace the lubricant under pressure and means or adjusting said stem to control the flow of lubricant of various viscosities. 9, A lubricator cu comprising a bodyportion provldin a lu ricant reservoir, a stem carried'by sai body portion, a piston in said reservoir, sprin means providlng for relative movement etween the piston and body portion, means providing a ischarge orifice and adjustable means for holding the spring means in compressed position so that the cu may be easily assembled and disassembled). 10. A lubricator cup comprising a body portion providing a lubricantA reservoir, a piston located in said reservoir, an apertured plate forming part of the body portion, spring means provided between the apertured plate and the piston for impartingorelative movement between the piston and dy portion, an extension carried by the piston and extending through the aperture in the said plate, means providing a discharge orifice for the lubricant reservoir and rotatably adjustable key and slot means provided by the latev and extension, said key and slot means being operable to hold the spring means in compressed position so that the cup may be easily assembled and disassembled.

In testimony whereof, I have signed my name to this specification. JAMES STEWART CRAIB.

@ERHMCATE 0F ERRECMN..

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